Question

The height of cylinder A is 10cm and its surface area is 440cm2. The surface area of cylinder B is 3960cm2. Calculate the height of cylinder B.

Answer 1

Answer:

here

Step-by-step explanation:

h=90

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Answer 2

According to the mark scheme : the answer is 30cm

Note :

$\frac{Side1}{Side2} = k$

$\frac{Area1}{Area2} = k^{2}$

Height of B will be denoted by x

Step-by-step explanation:

$\frac{3960}{440} = k^{2}$

$k^{2}$ = 9

k = $\sqrt{9}$

k = 3

Now,

$\frac{x}{10} = 3$

Hence, x = 30cm i.e. height of B is 30cm